/**
* Executes the task. Handles exceptions. Subclasses should implement doExecute() instead.
*
* @param space The environment in which the task is executing.
* @param obj The object that is executing the task.
* @param progress The time that has passed according to the environment executor.
*/
public void execute(
IEnvironmentSpace space, ISpaceObject obj, long progress, IClockService clock) {
ISpaceObject target = (ISpaceObject) getProperty(PROPERTY_TARGET);
IVector2 loc = (IVector2) obj.getProperty(Space2D.PROPERTY_POSITION);
IVector2 tloc = (IVector2) target.getProperty(Space2D.PROPERTY_POSITION);
if (!loc.equals(tloc)) throw new RuntimeException("Not at location: " + obj + ", " + target);
int ore = ((Number) target.getProperty(AnalyzeTargetTask.PROPERTY_ORE)).intValue();
int capacity = ((Number) target.getProperty(PROPERTY_CAPACITY)).intValue();
capacity += Math.min(ore, (time + progress) / TIME);
ore -= Math.min(ore, (time + progress) / TIME);
time = (time + progress) % TIME;
target.setProperty(AnalyzeTargetTask.PROPERTY_ORE, new Integer(ore));
target.setProperty(PROPERTY_CAPACITY, new Integer(capacity));
if (ore == 0) {
setFinished(space, obj, true);
}
}
/**
* Performs the action.
*
* @param parameters parameters for the action
* @param space the environment space
* @return action return value
*/
public Object perform(Map parameters, IEnvironmentSpace space) {
// System.out.println("move action: "+parameters);
Grid2D grid = (Grid2D) space;
IComponentIdentifier actor = (IComponentIdentifier) parameters.get(ISpaceAction.ACTOR_ID);
String direction = (String) parameters.get(PARAMETER_DIRECTION);
ISpaceObject avatar = grid.getAvatar(actor);
if (null == space.getSpaceObject(avatar.getId())) {
throw new RuntimeException("No such object in space: " + avatar);
}
IVector2 pos = (IVector2) avatar.getProperty(Space2D.PROPERTY_POSITION);
boolean skip = false;
if (DIRECTION_LEFT.equals(direction)) {
pos = new Vector2Int(pos.getXAsInteger() - 1, pos.getYAsInteger());
} else if (DIRECTION_RIGHT.equals(direction)) {
pos = new Vector2Int(pos.getXAsInteger() + 1, pos.getYAsInteger());
} else if (DIRECTION_UP.equals(direction)) {
pos = new Vector2Int(pos.getXAsInteger(), pos.getYAsInteger() - 1);
} else if (DIRECTION_DOWN.equals(direction)) {
pos = new Vector2Int(pos.getXAsInteger(), pos.getYAsInteger() + 1);
} else if (DIRECTION_NONE.equals(direction)) {
skip = true;
} else {
throw new RuntimeException("Unknown move direction: " + direction);
}
if (!skip) {
Collection obstacles = grid.getSpaceObjectsByGridPosition(pos, "obstacle");
if (obstacles != null && !obstacles.isEmpty()) {
throw new RuntimeException(
"Cannot move '" + direction + "' due to obstacles: " + obstacles);
}
// Preys can not "tunnel" through hunters, i.e. move from the field
// where the hunter is now to the field where the hunter was before.
if (avatar.getType().equals("prey")) {
Collection hunters =
grid.getSpaceObjectsByGridPosition(
(IVector2) avatar.getProperty(Space2D.PROPERTY_POSITION), "hunter");
if (hunters != null) {
pos = grid.adjustPosition(pos); // Hack!!! Position only converted in setPosition().
for (Iterator it = hunters.iterator(); it.hasNext(); ) {
ISpaceObject hunter = (ISpaceObject) it.next();
if (pos.equals(hunter.getProperty(PROPERTY_LASTPOS))) {
// System.out.println("Cannot move '"+direction+"' due to hunter: "+hunter);
throw new RuntimeException(
"Cannot move '" + direction + "' due to hunter: " + hunter);
}
}
}
}
// Remember last position of hunter (required for detecting "tunneling").
else if (avatar.getType().equals("hunter")) {
avatar.setProperty(PROPERTY_LASTPOS, avatar.getProperty(Space2D.PROPERTY_POSITION));
}
grid.setPosition(avatar.getId(), pos);
}
return null;
}